Disappointing beans and toms.

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Goosegirl

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Disappointing beans and toms.
« on: July 30, 2019, 11:30 »
This year I replenished my g-house bed with new bagged topsoil and compost and dug it over. Planted my toms and climbing and dwarf French beans with a scattering of BFB and all went well. The beans produced flowers and I had a few crops but then they slowed down and their flowers are now much smaller than usual. My Roma toms had some side-shoots pinched out but they just romped away so they're now more like big bushes and their flowers are also small. The last month or so I've been feeding them more or less every fortnight with Maxicrop but to no avail. All the leaves on the beans and toms look more healthy than I've ever seen before (with the odd exception) so am wondering if there's an excess of nitrogen in the bed. I've attached an earlier pic taken in mid-July showing the bean on the left, two toms in the middle, a cucumber and my sweetcorn are on the right. Having had a furtle amongst the foliage yesterday I did find two toms so should I cut the lower foliage off them so they get more light and what do I do about my beans?
Toms 1 (600 x 450).jpg
I don't like bananas unless it's raining. (A quote from my great-niece).

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JayG

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Re: Disappointing beans and toms.
« Reply #1 on: July 30, 2019, 13:32 »
Can't really address your observation about smaller flower sizes, but tomato flowers failing to set is often the result of excessively high temperatures - anything above about 30C is the figure usually quoted as the point at which the pollen is likely to become unviable, a temperature probably easily reached inside many GH's or PT's over the recent heatwave. (There is a difference in tolerance between different varieties, although that information doesn't seem to be readily available.)

Not that much you can do about it - adequate ventilation is obviously important, and roof shading can help keep the temperatures down (I do that partially anyway, because cukes don't like too much direct sun.)

Don't know if French beans are similarly affected, but I wouldn't be surprised if they were.
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New shoot

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Re: Disappointing beans and toms.
« Reply #2 on: July 30, 2019, 16:01 »
Maybe stop feeding for now and see what they do, then switch to a proper tomato feed once more fruit/beans set.  Tomerite and the like have double the K to N, whereas Maxicrop is equal K and N.  It could be the plants are just in growth mode because they have so much nitrogen available to them. 

The routine I use is to chuck some pelleted chicken manure into the pots of the greenhouse stuff to get them going, then feed all of it with tomato feed once they start doing something. 

I never worry about having lush green leaves on tomatoes either.  I remember Bob Flowerdew years ago on Gardener's World saying tomatoes kept too cossetted are not the greatest fruiters.  After all you don't eat the leaves he said while picking armfuls of fruit off his not so great looking plants.  It kind of stuck with me and has always paid off as well  :)

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Growster...

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Re: Disappointing beans and toms.
« Reply #3 on: July 30, 2019, 20:13 »
I wonder if the Roma should be a bush, not a cordon, Goosey? We used to grow them and while they are a great tom for salads etc, grown as a cordon, they don't do that much, being so small.

I made the mistake of growing toms in bags of cheap compost instead of growbags, and they just produced masses of greenery, and took ages to get to tom-stage! Clearly too much nitrogen, methinks. We're back on Shirley and G.Dels these days, and the first will get taken TOMORROW!!!

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"I remember Bob Flowerdew years ago on Gardener's World saying tomatoes kept too cossetted are not the greatest fruiters.  After all you don't eat the leaves he said while picking armfuls of fruit off his not so great looking plants.  It kind of stuck with me and has always paid off as well".

The man just used to say it like he meant it, didn't he, News!

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Goosegirl

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Re: Disappointing beans and toms.
« Reply #4 on: July 31, 2019, 10:50 »
Thanks all. I did get some Tomorite but should have looked at the NKP ratios between that and Maxicrop. I think the last feed was Tomorite so let's see what happens. Growster, you're right about them being more of a bush than a cordon so I've only pinched out a few side-shoots.



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